2HNO3 + CaCO3 → Ca(NO3)2 + H2O + CO2↑
2HCl + Pb(OH)2 → PbCl2↓ + 2H2O
2HCl + CaCO3 → CaCl2 + H2O + CO2↑
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2HNO3 + CaCO3 → Ca(NO3)2 + H2O + CO2↑
2HCl + Pb(OH)2 → PbCl2↓ + 2H2O
2HCl + CaCO3 → CaCl2 + H2O + CO2↑